N-烷基-N-甲基吡咯烷双（氟磺酰）亚胺离子液体PY13FSI和PY14FSI的物理和电化学性质
Physical and electrochemical properties of N-alkyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquids: PY13FSI and PY14FSI.
作者信息
Zhou Qian, Henderson Wesley A, Appetecchi Giovanni B, Montanino Maria, Passerini Stefano
机构信息
Ionic Liquids and Electrolytes for Energy Technologies Laboratory, Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA.
出版信息
J Phys Chem B. 2008 Oct 30;112(43):13577-80. doi: 10.1021/jp805419f. Epub 2008 Oct 2.
Two ionic liquids based upon N-alkyl-N-methylpyrrolidinium cations (PY(1R)(+)) (R=3 for propyl or 4 for butyl) and the bis(fluorosulfonyl)imide (FSI(-)), N(SO2F)2(-), anion have been extensively characterized. The ionic conductivity and viscosity of these materials are found to be among the highest and lowest, respectively, reported for aprotic ionic liquids. Both ionic liquids crystallize readily on cooling and undergo several solid-solid phase transitions on heating prior to melting. PY13FSI and PY14FSI are found to melt at -9 and -18 degrees C, respectively. The thermal stability of PY13FSI and PY14FSI is notably lower than for the analogous salts with the bis(trifluoromethanesulfonyl)imide (TFSI(-)), N(SO2CF3)2(-), anion. Both ionic liquids have a relatively wide electrochemical stability window of approximately 5 V.
两种基于N-烷基-N-甲基吡咯烷鎓阳离子（PY(1R)(+)）（R = 3代表丙基或4代表丁基）和双（氟磺酰）亚胺（FSI(-)，N(SO2F)2(-)）阴离子的离子液体已得到广泛表征。这些材料的离子电导率和粘度分别被发现是报道的非质子离子液体中最高和最低的之一。两种离子液体在冷却时都很容易结晶，并且在加热至熔化之前会经历几次固-固相变。发现PY13FSI和PY14FSI分别在-9℃和-18℃熔化。PY13FSI和PY14FSI的热稳定性明显低于具有双（三氟甲磺酰）亚胺（TFSI(-)，N(SO2CF3)2(-)）阴离子的类似盐。两种离子液体都具有约5 V的相对较宽的电化学稳定窗口。
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